import java.util.Stack;

public class Test {
    public static void main(String[] args) {
        MyStack stack = new MyStack();
        stack.push(1);
        stack.push(2);
        stack.push(3);
        System.out.println(stack);
        System.out.println(stack.pop());
    }

    public static void main1(String[] args) {
        Stack<Integer> stack = new Stack<>();
        stack.push(1);
        stack.push(2);
        stack.push(3);
        System.out.println(stack);
        System.out.println(stack.pop());
    }

}
